<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
    <style>
        body{
            padding-top: 70px;
        }
    </style>
</head>
<body>
    <!-- navbar-static-top为静止头部，不跟随屏幕移动 -->
    <nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container-fluid">
            <div class="navbar-header">
                <a class="navbar-brand" href="#">
                    <img src="bootstrap/img/mm.jpg" style="width: 75px">
                </a>
            </div>

            <ul class="nav navbar-nav">
                <li class="active"><a href="#">Link<span class="sr-only"></span></a></li>
                <li><a href="">Link</a> </li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button">
                        Dropdown
                        <span class="caret"></span>
                    </a>
                    <ul class="dropdown-menu" role="menu">
                        <li><a href="#">hello</a></li>
                        <li><a href="#">hello</a></li>
                        <li><a href="#">hello</a></li>
                        <li><a href="#">hello</a></li>
                        <li><a href="#">hello</a></li>
                    </ul>
                </li>
            </ul>

            <form class="navbar-form navbar-left" role="search">
                <div class="form-group">
                    <input type="text" class="form-control" placeholder="Search">
                </div>
                <button type="submit" class="btn btn-default">Submit</button>
            </form>
            <button type="button" class="btn btn-default navbar-btn navbar-right">Sign in</button>
            <p class="navbar-text">欢迎来到<a href="#" class="navbar-link">计科学院</a></p>
        </div>
    </nav>
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    <script src="jquery/jquery-2.1.4.min.js"></script>
    <script src="bootstrap/js/bootstrap.min.js"></script>
</body>
</html>